Dump-car.



v PATENTED. FEB. 24, 1903.

- E. D. H'A'VEN. DUMP CAR. 4

APPLICATION rum) H0128, 1902. I 30 MODEL. v -s sums-sum 1.

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O O 9 O WITNESSES: v. I Z %O@WNT0R.

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5o 9 is a section showing bearings for roller 10.

UNITED STATES I P TENT OFFICE.

EGBERT D. HAVEN, OF SAN JOSE, CALIFORNIA, ASSIGNOR OF ONE-HALF TO JAMESH. CROSETT, SAN JOSE, CALIFORNIA.

DUMP-CAR.

SPEOIFIGATION'forming part of Letters Patent No. 721,300, dated February24, 1903. Application filed November 28, 1902. Serial No. 132,696. (Nomodel-l I To all whom ii may concern:

Be it known that I, EGBER'I D. HAVEN, a citizen of the UnitedStates,residing at San Jose, county of Santa Clara, State of California,have invented an Improvement in D ump- Oars; and I hereby declare thefollowing to be a full, clear, and exact description of th same.

My invention relates to apparatus con nected with tilting or dumpingcars and controlled by any operator by means of air passing throughsuitable train-pipes, so that the cars may be tilted or dumped to eitherside or righted intoa horizontal position.

It consists in an arrangement of longitudinally-supported spiralchannels or grooves fixed to each car, rollers or travelers adapted tomove in said grooves and guided so as to travel in straight lines, andpistons moving in cylinders, With means for applying airpressure to oneside or, the other of the piston, so that when moved in one directionthe spiral will be compelledto follow the roller, and thus tilt the cartoone side, and when moved in the op'positedirection to tilt it to theopposite side. In conjunction with this are mechanisms for automaticallyunlatching thedischarge-gates when the car is dumped and latching themagain When it is restored to its normal position and pipes or passagesconnecting said pipes with opposite ends of the cylinders, with meansfor transferring the air from one side to the other of the pistons toactuate them and dump the car.

My invention also comprises details of construction, which will be morefully explained by reference to the accompanying drawings, in whichFigure 1 is a side elevation of one end of the car with my attachment.Fig. 2 is a transverse sectiontaken through 00 as, Fig. 1. Fig. 3 is atransverse section showing the gate-latching devices." Fig. 4: is abottom view showing the position of the spiral channels and connections.Figs. 5, 6, and 7 are views of the air-transferring valve andconnections between the pump and the cylinders. Fig. 8 is a diagrammaticview showing difierent positions of valve-actuating lever. Fig.

It is the object of my invention to enable the engineer of a train ofdumping-cars to tilt the cars and discharge the load and to' again placethem in the normal position by means of air-pressure under his personalcontrol. The cars may be of any desired length, having either two pairsof wheels or double trucks beneath them, according to the size.

For economy it is preferable to use long cars.

If short cars are used, a single dumpingdevice may be employed. With thelonger cars it is preferable ,to use two of these devices, one at eachend of the car.

As here shown,A represents the wh eels,upon which the car is carried,and-B is a stout frame extending from end to end of the car,

serving to support the train air-pipes 3 and 4, which extend through thetrain with proper couplings between the cars. shown these pipes arrangedupon the right and left for convenience, and these pipes are connectedwithfopposite ends'of cylinders 5,

fixed beneath the longitudinalbody of the.

car and having pistons 6 movable within them. On each car these pistonsare mounted upon piston-rods 7, which extend through i thecylinder-heads and are connected with slides, as at 8. These slidestravel upon guides mounted upon the frame-timbers, as shown at 9, andthus compel the slides and piston rods to. travel in straight lines whenthelpiston is moved. These slides carry rollers 10,journaled upon stoutvertical pins, and for the purpose of reducing friction they may bemounted upon antifrictional bearings, as shown .at 11. These rollerstravel in spiral'grooves or channels 12, which are in the form ofcylindrical segments. The grooves or channels may be supported by stoutarms fixed to the bottom of the tilting portion 13 of the car-body; buta convenient way is to fix or form the channels upon cylindricalsegments 14, so that the spirals extend in diagonal curved lines-aroundthe segments. These segmentshave their centers in the line of center ofoscillation of the carbody 13, and they are suitably supported on theirlines of oscillation-by journal-boxes, as at 15. The spiral grooves arepreferably made with an approximately straight connecting portion at thecenter, as shown at 16, the objectbeing to have. the actuating-rollers Ihave here.

10 standbetween the comparatively straight sides of the groove orchannel when the carbody is in its normally horizontal position and tothus assist in keeping itin its position with as little other aid aspossible.

The operation will then be as follows: Air under pressure is admitted toboth ends of the cylinders, which are thus charged with any desiredpressure, as sixty or one hundred pounds, and being evenly balanced thepressure upon each side of the piston, in conjunction with the straightportion between the ends of the spiral channel, will serve to maintainthe car in position without any other locks. When it is desired to dumpthe car, by means of a valve under the control of the engineer, to behereinafter described, air is transferred from one side of the piston tothe other, the increase in pressure being etfected by means of asuitable pump, and this forces the piston toward the side from which theair is being moved. This causes the slide 8 to travel upon its fixedguides 9, and the roller 10 moving in the channel will as soon as itenters the spiral portion compel the cylindrical segment to turn uponits bearings and carry with it the car-body to which it is socured, thustilting the latter to such an angle as to allow the contents to bedischarged when the gate on the discharge side is opened. After thedischarge has been elfected air is pumped back again to the oppositeside with suflicient increased pressure to force the piston back to thecenter of the cylinder, and the roller 10 partaking of this movementwill follow the spiral groove 12 until the car has been returned to itsnormal position. These operations are effected by means of a pump 17,having a plunger working therein and operated by a suitable engine ormechanism under the control of the engineer. This pump connects with thetrain-pipes 3 and 4, before described, by passages, which are controlledby a valve or cook which is turnable, so as to connect both train-pipeswith the pump to allow them to be simultaneously charged with air to therequired pressure, or after being thus 'charged the valve may be somoved as to allow the pump when working to withdraw the air from onetrainpipe and force it into the other, thus increasing the pressure uponone side of the pistons 6 and correspondinglydecreasing it upon theother side. By moving the valve to still another position allcommunication between the pump and the train-pipes is out off, and thepressure being then equal. upon each side of the piston 6 they will belocked in their contralposition,aspreviouslydescribed. Various forms ofvalves may be employed for this purpose. Ihave here shown the valve inthe form of a plug-cock 18, having passages through it in one direction,as at 19, which connect the pump 17 with both train-pipes3 and 4, sothat air can then be pumped into both pipes. A suitable check-valve, asat 20, prevents the return of the air. The train-pipe and the cylindersbeing thus charged, by turning the cock around in the position shown inFig. 7 all communication between the train-pipes and with the pump willbe out 01f. By turning the cock one-quarter of a revolution in onedirection from its locked position it will bring the passages 21 and 22into open communication with the train-pipes 3 and 4 and also intocommunication with the pump-cylinder 17. These passages 21 and 22 areprovided with valves 23 and 24, which open in opposite directions, sothat when the cock is in this position one valve will open inwardly toone of the train-pipes, as shown in Fig. 6, and the other will open intothe pump. Thus when the pump is in motion air will be drawn from thetrain-pipe, as 4 in Fig. 6, and transferred into the train-pipe 3, thuscharging the end of the car-cylinders with which the trainpipe 3 isconnected and reducing the pressure in the opposite ends of saidcylinders 'with which train-pipe 4 is connected. This moves the slide 8,and with it the roller 10, of all the cars, and they will all be tiltedsimultaneously and their contents discharged. If the dumping is to takeplace to the opposite side, the cock is turned to a position opposite tothat shown in Fig. 6, in which the valve 21 will close toward its pipe 3and the valve 22 will open toward its pipe 4. The movement of the pumpwill then reverse the movement of the air through the train-pipe andcylinders, moving the slide 8 and rollers 10 in the opposite direction,and following the spiral it will cause the car to dump to the oppositeside. Thus the load can be discharged to either side by the simplemovement of the valve or cock 18.

In order to automatically open or close the gates 25 upon opposite sidesof the car, I have shown these gates as hinged at 26 on a line with thetop of the car and nearer to the center than the bottom portion of thegates. The object of this is to insure the gate which has been opened bythe tilting of the car being closed in time for the locking mechanism toact upon it before the car-body has returned to a horizontal position.The catches 27 on the gates project below the lower edges of the doorsand are engaged by latches 28, which are fulcrumed to the bottom of thecar, as at 29, and the opposite projecting ends of these latches areconnected by rods or links 30 with the ends of lever arms 31, which arefulcrumed, as shown at 32. The lower ends of these arms interior to thefulcrums 32 are curved toward the center.

33 represents rollers so fulcrumed with relation to the arms 31 thatwhen the car is in its horizontal position the inner ends of the arms 31will contact with the rollers 33, so as to keep the upper ends of thearms pressed outward, and through the connecting-rods 30 the latches 28will be held in engagement with the catches 27 of the doors to preventthem being opened. As soon as the car-body commences to tilt the levers31 will move along the rollers 33 until the fulcrum-points 32 havepassed the rollers. Then the pressure of the rollers" upon theouter-ends of the lever-arms will force them toward the center, pullingupon the rods 30 and the connected ends of the latches 28, thusdisengaging the outer ends of the latches from the catches 27 of thegates on the car, so that the latter will swing open to discharge theload. No attention to these devices is necessary, as they will operateautomatically by the tilting of the car-bodies. When several latches areused on each door, they may be connected with the one provided with theactuating mechanism by extending the fulcrum-shaft 29. The cylindricalsegments 14:, which carry the spiral grooves or channels 12, may alsoserve to contain ballast which will partially counterbalance the weightof the upper portion of the car-body and make it easier to turn." Whenthe valve or cock is in position, (shown in Fig. 5,) it provides an opencommunication between the two train-pipes and between opposite ends ofthe cylinder, so that there will be a free movement of air, and thisallows the car-body to be returned to its normal position by theweighted segments after the load has been discharged.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. A car-body pivoted and tiltable from side to side upon its truck orwheeled frames, longitudinally-disposed spiral channels fixed to thecar-body and having the same center of motion, slides and guides uponwhich said slides are movable longitudinally with relation to the spiralgrooves, rollers carried by the slides adapted to travel in the groovesand means for moving the slides and rollers longitudinally to move thespirals'and tilt the car-body. v

2. A car-body pivoted and turnable upon longitudinally-disposedbearings, spirallygrooved cylindrical segments fixed to the carbodyhaving the same center of motion, rollers fitted to travel in the spiralgrooves, slides upon which the rollers are carried, and guides locatedupon the frame-timbersot' the car upon which the slides are movable in astraight line whereby motion is transmitted through the spirals to tiltthe car-body, mechanism connected with the slides whereby the latter maybe reciprocated in either direction.

3. A longitudinally pivoted tiltable carbody, a spirally-groovedcylindrical segment fixed thereto having the same center of oscillation,said spiral groove having an approximately straight portion centralbetween its ends, a roller adapted to travel in the groove and to act asa lock when standing in the straight portion thereof, aslide movableupon longitudinally-disposed guides beneath the segment and upon whichslide the roller is carried, and mechanism by which the slide and rollermay be moved in either direction from the central position whereby thecar may be tilted and dumped to either side.

4. A car-bodylongitudinally pivoted and tiltable from side to side, acylindrical segment fixed and turnable therewith and having aspirally-disposed groove or channel on its curved surface, a rolleradapted to travel insaid channel, a slide and fixed guides on the truckor frame timbers of the car upon which slide the roller is carried, acylinder having a piston movable therein and pistonrod connecting withthe slide, means for supplying'air under pressure upon opposite sides ofthe piston, and means for transferring the air from one side of thepiston to the other whereby the latter is moved and motion transmittedto the slide and roller.

5. A longitudinally-pivoted tiltable carbody having a cylindrical andspirallygrooved segment fixed and turnable therewith, a longitudinallymovable slide and guides upon which it travels and connections betweenthe slide and the spiral groove, a cylinder disposed lengthwise of thecar having a piston movable therein, a piston-rod connecting with thetraveling slide, train airpipes extending upon either side of thecylinder, one having connection with one end of the cylinder and theother with the other, a pump under control of the engineer and a cock orvalve whereby communication may be opened to charge the train-pipes andboth ends of the cylinders equally.

6. A longitudinallypivoted and tiltable car-body, a cylindrical andspirally-grooved segment fixed and turnable therewith, alongitudinally-guided traveling slide and connections whereby motion istransmitted from it to the spirally-grooved segment, a cylinder having apiston movable therein, a piston-rod connecting with the travelingslide, a pump under the control of'the engineer, passages andtrain-pipes extending upon either side of the cylinder, one of saidpipes connecting with one end of each cylinder, and the other with theopposite end, passages'connecting the pump with both of said pipeswhereby the pipes and cylinders may be charged with air, a valve or cockhaving ports whereby communication may be established between thetrain-pipes and the cylinder and valves whereby the air may be drawnfrom one train-pipe and forced into the other to move the pistons in thecar-cylinders in either direction.

7. A longitudinallypivoted and tiltable car-b0dy,a spirally-channeledcylindrical segment fixed and turnable therewith, alongitudinally-guided and movable slide and connections between saidslide and the spiral groove and mechanism whereby the slide istudinally-movable slide and connections beis tilted whereby the latchesare caused to tween it and the spiral groove whereby the engage and lockthe gates or to disengage and cylinder is turned and the car-bodytilted, allow the gates to open when the car-body is swinging gateshinged at the upper part of tilted. r

5 the sides of the car-body having catches fixed In witness whereof Ihave hereunto set my thereto, latches fnlernrned to the sides of thehand.

car-body to en a e said catches fulcrunned levers and co ngcting-rods bywhich the EGBERT HAVEN latches are moved in unison with the levers,Witnesses:

10 and stationary journaled rollers over which S. H. NOURSE,

the fulcruined levers pass when the car-body JESSIE C. BRODIE.

